tad: Calculate time since most recent dose.

In bergsmat/tad: A Method to Calculate Time Since Most Recent Dose

Description

Calculate time since most recent dose.

Usage

tad(x, dose = rep(FALSE, length(x)), addl = rep(0, length(x)), ii = rep(0,
  length(x)), index = rep(1, length(x)), pre = TRUE, ...)

Arguments

x	a numeric vector of event times
dose	length x logical indicating which of x are dose times
addl	length x integer: number of additional doses
ii	length x numeric: interdose interval for addl
index	length x factor (optional) indicating subgroups to evaluate
pre	assume that simultaneous sample precedes implied dose
...	passed to tod()

Value

numeric

See Also

tod

Examples

data(tad1)
x <- tad1
head(x)
x$tad <- tad(
   x = x$TIME,
   dose = x$EVID %in% c(1,4) & is.na(x$C),
   addl = x$ADDL,
   ii = x$II,
   index = x$ID
 )
head(x)

bergsmat/tad documentation built on May 12, 2019, 4:21 p.m.